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Healthy fish and plants
Fish depend on the right ambient temperature because, being cold-blooded animals, they are not able to adjust their own body temperatures. The vital functions of cold-blooded animals decrease with falling temperatures. The right aquarium temperature is therefore very important to ensure the animals maintain their food intake and guarantee a smooth continuation of all metabolic processes.
Depending on the origin of the fish, the temperature they feel comfortable at, varies. With the practical JBL Hang-on aquarium thermometer you can monitor the temperature in the range of 0 - 40 °C.

Precise measurement
The thermometer with the precision capillary, made in Germany, has excellent measurement accuracy. Just hang it over the aquarium rim.

The JBL thermometer or the JBL aquarium thermometer is broken. It contains a red liquid. What does the red liquid consist of and is it toxic?

The thermometer doesn’t contain any mercury. The liquid contains an alcohol solution with colouring. It is non-toxic. Both ingredients are quickly broken down by the bacteria in the aquarium. Furthermore the diluting effect should be taken into consideration. The silvery pearls are an iron compound and are therefore harmless. Simply siphon them out of the aquarium.

Do the thermometer balls in the JBL thermometers contain mercury ?

No, they don’t contain mercury. Mercury has a melting point of -38,8°C and would be liquid at room temperature.

Cooling Aquariums – Summer Heat in Aquariums

Testing Water in the Jungle

Our 15 expeditions have taught us something new: In natural waters nitrogens (ammonium/ammonia, nitrite and nitrate) and phosphates are ALWAYS scarce and below the limit of detection. Only when humans have an influence on the natural water, can nitrogens and phosphates be found.

Outline: Fertilisation in the Aquarium

The JBL plant care concept leads to vigorous and healthy growth even with the most demanding aquatic plants. JBL has all the components you need, whether it’s a fertiliser, a bottom substrate or a fully automatic CO2 fertiliser system.

Hanging is the best solution – not just in Westerns

Water Analysis Online Laboratory

Enter your water parameters and get an in-depth analysis of your values in a matter of seconds.
You enter your water values – and we analyse! Here you have the opportunity to enter the measured water values directly into the JBL Online Laboratory. This will analyse your values and explain and submit corrective measures.